Heater eob hot water or steaffl



J. T. BUNTiNG.

HEATER FOR HOT WATER 0R STEAM.

APPLICATION FILED AU G.28, I915- Patented Jun 3, 1919.

3 SHEETS-SHEET l- WAsiuNnmN. o, c

I. T. BUNTING.

HEATER FOR HOT WATER OR STEAM.

APPLICATION FILED AUG.2B. I915.

Patented June 3 Q Q) C) W w/ w g T y m w w w 4 JOHN T. BUNTING, or cnroeoo, ILLmoIs.

HEATER me HOT WATER on STEAM.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed. August 28, 1915. Serial No. 47,764.

T 0 all whom it may concern:

Be it known that 1, JOHN T. BUN'IING, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Heaters for Hot later or Steam, of which the following is a specification.

This inventionrelates in general to heaters for hot water or steam for usein heating buildings of various characters. 7

Its object is broadly the provision of a heater which will minimize the use of heating fuel and which may be constructed of size materially smaller for given capacity than has been possible with those generally in use prior to my invention.

A further object of the invention is the provision of a heater of this character which will provide a maximum amount of heating surface within the heater and this without material increase in cost of construction.

Other objects and advantages of the invention will be apparent as it is better understood from the following description when considered in connection with the accompanying drawing illustrating a preferred embodiment thereof.

Referring to the drawings,

Figure 1 is a vertical section taken transversely of a form of heater embodying my invention;

Fig. 2 is a view taken similarly but at right angles to the View shown in Fig. 1;

Fig. 3 is a section taken substantially 0n the line 33 of Fig. 2; I

Fig. A is a similar view taken substantially on the line 4-4 of Fig. 2;

Fig. 5 is a transverse sectional viewof a:

slightly different form of heater; and

Fig. 6 is a horizontal section taken sub- I stantially on the line 6.-6'of Fig. 5.

Considering first the form of heater shown in Figs. 1 to 4 which is the form intended for use in small residences and in small apartment buildings, I have shown an inner water tank 11 in the present instance of cylindrical form through which extend a plurality of fire lines or tubes 12. This tank is supported from an inner metal shell 13 by horizontally extending connecting pipes 14 arranged in two encircling series, which pipes afford communication with an outer water chamber 15 spaced away from the inner water chamber formed by the tween the shell 15 and an outer shell 17 the two shells being closed at their tops at 18 and 19 respectively. An outer fire or heating chamber 21 is provided and this extends about the outer water chamber and is formed by the outer shell 17 and a suitable brick or other inclosure 22. A fine 23 extends through the outer water chamber and establishes communication between the inner heating or fire chamber and the outer flue chamber.

Heated gases generated through the burning of the fuel pass upwardly within the inner heating chamber, as indicated by the arrows, playing upon the outer face of the tank 11 and upon the inner faces of the tubes 12 and shell 14. Above the tank they pass through the flue- 23' to the outer heating chamber and in this chamber are directed downwardly by baffles 24: extending across the heating chamber and from above the fine 23 to nearly opposite the bottom of the tank '11 in the present instance. These baflies extend from what may be termed the rear of the heater to well around its sides. After the gases reach the bottom of the baflies they turn and travel upwardly in the outer heating chamber to its top across and about which'they' move to an outlet flue 25. A connecting tube 26 extendsbetween the top of the tank 11 and that part of the outer water chamber defined by the caps or closures 18 and 19 for the shells 15 and17. An upward circulation pipe 27 is provided for conducting the heating fluid to the house heating system, return being had through a pipe 28'near the bottom, if water be used for heating the space between the caps 18 and 19 and the connections 26 and 27 are filled with water, the whole system circulating as heating progresses.

When the heater is used for steam sufficient room is left between the caps 18 and 19 to form a steam dome and if desired the ordinary dome attachments and parts are provided. Much or all the water passing through the system either in the form of water or in the form of steam is subject first to heating in the outer heating chamber and then to heating in the inner heating chamber. Both the outer and inner faces of the outer water chamber receive heat from radiation and the same is true of the outer faces of the tank and caps-and of the inner faces of the fire tubes 12.

The structure shown in Figs. 5 and 6 is.

an adaptation of the same construction to the heating of larger buildings and also for the use of soft coal and other natural smoky fuels without the production of an appreciable amount of smoke from the heater. In this construction the imier heating chamber consists of two tanks 31 and 32 through each of which extendfire tubes 33 and 34. The tanks 31 and 32 are spaced apart by a small intermediate water chamber 35 and also by fire flues or heating spaces 36 which separate the intermediate water chamber from the two tanks 31 and 32. The intermediate water chamber '35 is disposed above a lower partition 37. The tank 31 is preferably materially larger than the tank 32 and beneath the tank 31 is a grate 38 which may be termed the main grate of the heater.

The inner shell 39 which defines the outlets of the complete inner heating chamber is a metallic structure extending about the twotanks with its inner face spaced well away from their outer faces to provide surrounding heating or fire chambers 41. This inner shell is closed at its top and directs the heated gases that have passed upwardly through the tubes 33 and to the tank 31 across the top of the intermediate water chamber 35 and down through the fines 34 of the tank 32 and down also about the sides of this tank.

A grate 42 is located beneath the tank 32 and this grate serves to burn any unburned combustible matter in the gases that pass down through the fire tubes 34 or that pass down about the tank 32. An outer water chamber 43 is provided about the inner shell 39 and is defined by this inner shell and an outer shell 44 and the intermediate inner water chamber communicates at its ends with this outer water chamber. A flue 45 is provided through the outer water chamber 43 to permit the products of combustion of both grates 38 and 42 to pass into what may be termed an outer heating chamber 46. This chamber is defined by the outer shell 44 and a wall or other suitable inclosure 47.

Products of combustion passing through the flue 45 at what may be termed the rear of the heater, pass forwardly through the sides of the outer heating chamber to near the front and then upwardly over bafiies 48 to an outlet 49 at the rear of the heater and near or at the top of the outer heating chamber, the products of combustion thus passing in a circuitous path from the flue 45 to the outlet 49 which path leads first downwardly and from back to front of the heater and then upwardly and back to the back of the heater and above its top. Water tubes 51 extend through the outer heating chamber and between the intermediate water chamber 35 and the upper portion of the outer water chamber 43. An inlet 52 and an outlet 53 are provided to establish desired circulation.

The water in the tanks in both instances 1TEi3t hot through the circulation and preheating in the outer water chamber, much of it passing through the inner water chambers and also through the radiation through the fire tubes and through the surfaces or shells forming walls of the inner and outer fire chambers.

It will be manifest that my invention provides for a material increase in surfaces eX- posed to the heated gases and provides for an abstraction from the heated gases of a maximum quantity of their heating content. The structures may be economically provided and the heating surfaces are so arranged as to permit the formation of a heater of size about half that required in the heaters generally used for a given capacity.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing any of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim l. A heater of the character described, having a combustion chamber located within an outer water chamber and provided with two grates therein, a pair of inner water chambers within said outer water chamber and spaced therefrom and from each other, one of each of said inner water chambers being located above one of each said grates, said inner and outer water chambers providing a passage for hot gases between said inner water chambers and said outer water chamber, fire tubes through said inner water chambers and communicating with said passage, a partition partially separating the space within the outer water chamber to partially isolate each inner water chamber and its grate from the other, a hot gas chamber about and without said outer water chamber, and apassageway between one part of the space and said outer water chamber located beneath the inner water chamber in said part of said space whereby the gases of combustion from the grate beneath the one inner water chamber pass up about said inner water chamber and through the tubes through it and over and down about the other inner water chamber and through the tubes through it and over the grate-beneath the last mentioned inner water chamber and out into the hot gas chamber.

2. A heater of the character described, comprising a pair of inner waterchambers,

a main grate beneath one of said inner water chambers, a smoke consuming grate beneath the other, an outer water chamber connected to said inner water chambers, a heating chamber spacing said inner water chamber from said outer water chamber, another heating chamber disposed about said outer water chamber, the walls of said chambers providing a passage for the hot gases of the combustion from the first mentioned grate about both said inner water chambers one after the other; thence across the second mentioned grate and thence with the heated gases of the second mentioned grate about the outside of the outer water chamber.

3. A heater of the character described,

. comprising a pair of inner water chambers, a

main grate beneath one of said inner water chambers, a smoke consuming grate beneath the other, an outer water chamber connected to said inner water chambers, a heating chamber spacing said inner water chamber from said outer water chamber, another heating chamber disposed about said outer water chamber, the walls of said chambers providing a passage for the hot gases of the combustion from the first mentioned grate about both said inner water chambers one after the other, thence across the second mentioned grate and thence with the heated gases of the second mentioned grate about the outside of the outer water chamber, and means for conducting the combined gases of the two grates in a circuitous path while in the outer heating chamber.

4. A heater of the character described, comprising a pair of inner water chambers, a main grate beneath one of said inner water chambers, a smoke consuming grate beneath the other, an outer water chamber connected the first mentioned grate first upwardly about and through one of said inner water chambers and over and downwardly through and about the other inner Water chamber, thence over said smoke consuming grate and then about the outside of the outer water chamber.

5. A heater of the character described, comprising a pair of inner water chambers, a main grate beneath one of said inner water chambers, a smoke consuming grate beneath the other, an outer water chamber connected to said inner water chambers, a heating chamber spacing said inner water chamber from said outer water chamber, another heating chamber disposed about said outer water chamber, a stack outlet connection and inclined deflecting Walls meeting at their tops and disposed on opposite sides of said heater in said outer heating chamber, the junction of said deflecting walls being located above thecommunication between said outer heating chamber and the inner heating chambers and beneath the stack outlet connection.

Signed in the presence of two subscribing witnesses.

JOHN T. BUNTING. Witnesses:

J. C. CARPENTER, EsTHnR ABRAMs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

